He married
Mary P. Stewart.
David was born at
South Carolina on 11 October 1813. He was the son of
John Millen and
Martha Moffett. He married
Margaret McMillan. David was listed as the head of a family on the 1850 Census at
Xenia Twp., Greene Co., Ohio. 1850 Ohio, Greene Co., Xenia Twp. lists the following family: David Millen, age 30, born in South Carolina; Mary P. Millen, age 28, born in Ohio; Martha J. Millen, age 4, born in Ohio; Margaret E. Millen, age 4, born in Ohio; A.S. Stuart, age 16, female, born in Ohio; Calvin Hutchinson, age 17, born in Ohio.. David was listed as the head of a family on the 1860 Census at
Xenia, Greene Co., Ohio. 1860 Ohio, Greene Co., 1st Ward, City of Xenia lists the following family: David Millen, age 46, born in South Carolina; Mary P. Millen, age 35, born in Ohio; Martha P. Millen, age 12, born in Ohio; Margaret A. Millen, age 10, born in Ohio; Eva A. Millen, age 4, born in Ohio; Carrie A. Millen, age 4, born in Ohio; Eddie S. Millen, age 2, born in Ohio.. David was listed as the head of a family on the 1870 Census at
Xenia Twp., Greene Co., Ohio. 1870 Ohio, Greene Co., 1st Ward, City of Xenia lists the following family: David Millen, age 56, born in South Carolina; Mary Millen, age 45, born in Ohio; Jennie Millen, age 23, born in Ohio; Emma Millen, age 21, born in Ohio; Eva Millen, age 16, born in Ohio; Cora Millen, age 14, born in Ohio; Eddie Millen, age 10, born in Ohio.. David died on 21 May 1889 at
Ohio at age 75. His body was interred in May 1889 at
Xenia, Greene Co., Ohio, at Woodland Cemetery.